A person should never focus on minimal $ down, they should focus on the deal, a "deal" worth buying, operating, the strategy, because the $ is always out there looking for a place to land that's safe. 

Making millions a year and often paying $0 in taxes.Short Term Rentals supercharge this:RE pros use cost segregation and bonus depreciation combined with leverage to create massive losses with minimal cash.Combined with 1031s and snowballing, you create a business that never pays tax.

Working with contractors can be extremely difficult as projects get delayed and there is poor communication(red flags were not present before project began).

The deal cash flows minimally initially then after the second and third mortgages are paid off it becomes a cash flow cow.

While this is the most expensive option, it minimizes the risk of costly mistakes and ensures you’re getting tailored advice.If you’re confident in handling the process, the DIY approach can save you money.

The flexibility and context are often key to maintaining occupancy, while still minimizing your risk.

I am surprised these lending institutions don't regularly run algorithms showing which loans have been assumed Seems like an relatively easy thing to do to regulate and in a way minimize risk - maybe have more defaults but still maximize their loans by forcing compliance 

Many investors do this and don’t see issues, but it’s best to proceed carefully and know there’s some risk.You don’t necessarily have to inform the lender, but it's wise to consult a real estate attorney or CPA to guide the process and minimize risk.

Both of these challenges can often be minimized with the right team and guidance from an experienced investor.As @Jay Hinrichs mentioned, appreciation is the main driver of wealth in real estate.

REITs offer a stock-market-like approach with no management required, while turnkey rental properties provide a fully passive income stream with minimal involvement.